Lines Matching +full:cpu +full:- +full:1
1 // SPDX-License-Identifier: GPL-2.0-or-later
10 * PowerPC-64 Support added by Dave Engebretsen, Peter Bergner, and
29 #include <linux/cpu.h>
75 /* State of each CPU during hotplug phases */
106 #define THREAD_GROUP_SHARE_L1 1
125 * On big-cores system, thread_group_l1_cache_map for each CPU corresponds to
126 * the set its siblings that share the L1-cache.
131 * On some big-cores system, thread_group_l2_cache_map for each CPU
133 * L2-cache.
138 * On P10, thread_group_l3_cache_map for each CPU is equal to the
149 int smt_enabled_at_boot = 1;
152 * Returns 1 if the specified cpu should be brought up during boot.
158 /* Special case - we inhibit secondary thread startup in smp_generic_cpu_bootable()
169 return 1; in smp_generic_cpu_bootable()
177 return -EINVAL; in smp_generic_kick_cpu()
181 * cpu_start field to become non-zero After we set cpu_start, in smp_generic_kick_cpu()
184 if (!paca_ptrs[nr]->cpu_start) { in smp_generic_kick_cpu()
185 paca_ptrs[nr]->cpu_start = 1; in smp_generic_kick_cpu()
192 * Ok it's not there, so it might be soft-unplugged, let's in smp_generic_kick_cpu()
244 * The NMI IPI is a fallback and not truly non-maskable. It is simpler
252 [PPC_MSG_TICK_BROADCAST] = "ipi tick-broadcast",
265 return -EINVAL; in smp_request_message_ipi()
268 return 1; in smp_request_message_ipi()
286 void smp_muxed_ipi_set_message(int cpu, int msg) in smp_muxed_ipi_set_message() argument
288 struct cpu_messages *info = &per_cpu(ipi_message, cpu); in smp_muxed_ipi_set_message()
289 char *message = (char *)&info->messages; in smp_muxed_ipi_set_message()
295 WRITE_ONCE(message[msg], 1); in smp_muxed_ipi_set_message()
298 void smp_muxed_ipi_message_pass(int cpu, int msg) in smp_muxed_ipi_message_pass() argument
300 smp_muxed_ipi_set_message(cpu, msg); in smp_muxed_ipi_message_pass()
306 smp_ops->cause_ipi(cpu); in smp_muxed_ipi_message_pass()
310 #define IPI_MESSAGE(A) (1uL << ((BITS_PER_LONG - 8) - 8 * (A)))
312 #define IPI_MESSAGE(A) (1uL << (8 * (A)))
322 /* sync-free variant. Callers should ensure synchronization */
330 all = xchg(&info->messages, 0); in smp_ipi_demux_relaxed()
354 } while (READ_ONCE(info->messages)); in smp_ipi_demux_relaxed()
360 static inline void do_message_pass(int cpu, int msg) in do_message_pass() argument
362 if (smp_ops->message_pass) in do_message_pass()
363 smp_ops->message_pass(cpu, msg); in do_message_pass()
366 smp_muxed_ipi_message_pass(cpu, msg); in do_message_pass()
370 void arch_smp_send_reschedule(int cpu) in arch_smp_send_reschedule() argument
373 do_message_pass(cpu, PPC_MSG_RESCHEDULE); in arch_smp_send_reschedule()
377 void arch_send_call_function_single_ipi(int cpu) in arch_send_call_function_single_ipi() argument
379 do_message_pass(cpu, PPC_MSG_CALL_FUNCTION); in arch_send_call_function_single_ipi()
384 unsigned int cpu; in arch_send_call_function_ipi_mask() local
386 for_each_cpu(cpu, mask) in arch_send_call_function_ipi_mask()
387 do_message_pass(cpu, PPC_MSG_CALL_FUNCTION); in arch_send_call_function_ipi_mask()
401 * concurrency or re-entrancy.
421 while (raw_atomic_cmpxchg(&__nmi_ipi_lock, 0, 1) == 1) { in nmi_ipi_lock_start()
431 while (raw_atomic_cmpxchg(&__nmi_ipi_lock, 0, 1) == 1) in nmi_ipi_lock()
438 WARN_ON(raw_atomic_read(&__nmi_ipi_lock) != 1); in nmi_ipi_unlock()
468 ret = 1; in smp_handle_nmi_ipi()
478 static void do_smp_send_nmi_ipi(int cpu, bool safe) in do_smp_send_nmi_ipi() argument
480 if (!safe && smp_ops->cause_nmi_ipi && smp_ops->cause_nmi_ipi(cpu)) in do_smp_send_nmi_ipi()
483 if (cpu >= 0) { in do_smp_send_nmi_ipi()
484 do_message_pass(cpu, PPC_MSG_NMI_IPI); in do_smp_send_nmi_ipi()
497 * - cpu is the target CPU (must not be this CPU), or NMI_IPI_ALL_OTHERS.
498 * - fn is the target callback function.
499 * - delay_us > 0 is the delay before giving up waiting for targets to
502 static int __smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), in __smp_send_nmi_ipi() argument
507 int ret = 1; in __smp_send_nmi_ipi()
509 BUG_ON(cpu == me); in __smp_send_nmi_ipi()
510 BUG_ON(cpu < 0 && cpu != NMI_IPI_ALL_OTHERS); in __smp_send_nmi_ipi()
526 if (cpu < 0) { in __smp_send_nmi_ipi()
531 cpumask_set_cpu(cpu, &nmi_ipi_pending_mask); in __smp_send_nmi_ipi()
538 do_smp_send_nmi_ipi(cpu, safe); in __smp_send_nmi_ipi()
544 udelay(1); in __smp_send_nmi_ipi()
547 delay_us--; in __smp_send_nmi_ipi()
567 int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us) in smp_send_nmi_ipi() argument
569 return __smp_send_nmi_ipi(cpu, fn, delay_us, false); in smp_send_nmi_ipi()
572 int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us) in smp_send_safe_nmi_ipi() argument
574 return __smp_send_nmi_ipi(cpu, fn, delay_us, true); in smp_send_safe_nmi_ipi()
581 unsigned int cpu; in tick_broadcast() local
583 for_each_cpu(cpu, mask) in tick_broadcast()
584 do_message_pass(cpu, PPC_MSG_TICK_BROADCAST); in tick_broadcast()
603 int cpu; in crash_send_ipi() local
607 for_each_present_cpu(cpu) { in crash_send_ipi()
608 if (cpu_online(cpu)) in crash_send_ipi()
619 do_smp_send_nmi_ipi(cpu, false); in crash_send_ipi()
631 * on ibm,os-term rtas call. Skip IPI callbacks to other CPUs before in crash_smp_send_stop()
662 while (1) in nmi_stop_this_cpu()
686 while (1) in stop_this_cpu()
716 = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; in smp_store_cpu_info()
721 * Relationships between CPUs are maintained in a set of per-cpu cpumasks so
723 * returns the that cpumask for the given CPU.
741 * Extends set_cpus_related. Instead of setting one CPU at a time in
763 * parse_thread_groups: Parses the "ibm,thread-groups" device tree
764 * property for the CPU device node @dn and stores
768 * @dn: The device node of the CPU device.
770 * output of "ibm,thread-groups" is stored.
772 * ibm,thread-groups[0..N-1] array defines which group of threads in
773 * the CPU-device node can be grouped together based on the property.
777 * ibm,thread-groups[i + 0] tells us the property based on which the
778 * threads are being grouped together. If this value is 1, it implies
783 * ibm,thread-groups[i+1] tells us how many such thread groups exist for the
784 * property ibm,thread-groups[i]
786 * ibm,thread-groups[i+2] tells us the number of threads in each such
788 * Suppose k = (ibm,thread-groups[i+1] * ibm,thread-groups[i+2]), then,
790 * ibm,thread-groups[i+3..i+k+2] (is the list of threads identified by
791 * "ibm,ppc-interrupt-server#s" arranged as per their membership in
795 * If "ibm,thread-groups" = [1,2,4,8,10,12,14,9,11,13,15,2,2,4,8,10,12,14,9,11,13,15]
797 * a) [1,2,4,8,10,12,14,9,11,13,15]
802 * a) provides information of Property "1" being shared by "2" groups,
803 * each with "4" threads each. The "ibm,ppc-interrupt-server#s" of
805 * "ibm,ppc-interrupt-server#s" of the second group is
806 * {9,11,13,15}. Property "1" is indicative of the thread in the
811 * each group with "4" threads. The "ibm,ppc-interrupt-server#s" of
813 * "ibm,ppc-interrupt-server#s" of the second group is
815 * group share the L2-cache.
817 * Returns 0 on success, -EINVAL if the property does not exist,
818 * -ENODATA if property does not have a value, and -EOVERFLOW if the
831 count = of_property_count_u32_elems(dn, "ibm,thread-groups"); in parse_thread_groups()
833 ret = of_property_read_u32_array(dn, "ibm,thread-groups", in parse_thread_groups()
840 struct thread_groups *tg = &tglp->property_tgs[property_idx++]; in parse_thread_groups()
842 tg->property = thread_group_array[i]; in parse_thread_groups()
843 tg->nr_groups = thread_group_array[i + 1]; in parse_thread_groups()
844 tg->threads_per_group = thread_group_array[i + 2]; in parse_thread_groups()
845 total_threads = tg->nr_groups * tg->threads_per_group; in parse_thread_groups()
850 tg->thread_list[j] = thread_list[j]; in parse_thread_groups()
854 tglp->nr_properties = property_idx; in parse_thread_groups()
862 * get_cpu_thread_group_start : Searches the thread group in tg->thread_list
863 * that @cpu belongs to.
865 * @cpu : The logical CPU whose thread group is being searched.
866 * @tg : The thread-group structure of the CPU node which @cpu belongs
869 * Returns the index to tg->thread_list that points to the start
870 * of the thread_group that @cpu belongs to.
872 * Returns -1 if cpu doesn't belong to any of the groups pointed to by
873 * tg->thread_list.
875 static int get_cpu_thread_group_start(int cpu, struct thread_groups *tg) in get_cpu_thread_group_start() argument
877 int hw_cpu_id = get_hard_smp_processor_id(cpu); in get_cpu_thread_group_start()
880 for (i = 0; i < tg->nr_groups; i++) { in get_cpu_thread_group_start()
881 int group_start = i * tg->threads_per_group; in get_cpu_thread_group_start()
883 for (j = 0; j < tg->threads_per_group; j++) { in get_cpu_thread_group_start()
886 if (tg->thread_list[idx] == hw_cpu_id) in get_cpu_thread_group_start()
891 return -1; in get_cpu_thread_group_start()
894 static struct thread_groups *__init get_thread_groups(int cpu, in get_thread_groups() argument
898 struct device_node *dn = of_get_cpu_node(cpu, NULL); in get_thread_groups()
899 struct thread_groups_list *cpu_tgl = &tgl[cpu]; in get_thread_groups()
905 *err = -ENODATA; in get_thread_groups()
909 if (!cpu_tgl->nr_properties) { in get_thread_groups()
915 for (i = 0; i < cpu_tgl->nr_properties; i++) { in get_thread_groups()
916 if (cpu_tgl->property_tgs[i].property == group_property) { in get_thread_groups()
917 tg = &cpu_tgl->property_tgs[i]; in get_thread_groups()
923 *err = -EINVAL; in get_thread_groups()
930 int cpu, int cpu_group_start) in update_mask_from_threadgroup() argument
932 int first_thread = cpu_first_thread_sibling(cpu); in update_mask_from_threadgroup()
935 zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cpu)); in update_mask_from_threadgroup()
940 if (unlikely(i_group_start == -1)) { in update_mask_from_threadgroup()
941 WARN_ON_ONCE(1); in update_mask_from_threadgroup()
942 return -ENODATA; in update_mask_from_threadgroup()
952 static int __init init_thread_group_cache_map(int cpu, int cache_property) in init_thread_group_cache_map() argument
955 int cpu_group_start = -1, err = 0; in init_thread_group_cache_map()
961 return -EINVAL; in init_thread_group_cache_map()
963 tg = get_thread_groups(cpu, cache_property, &err); in init_thread_group_cache_map()
968 cpu_group_start = get_cpu_thread_group_start(cpu, tg); in init_thread_group_cache_map()
970 if (unlikely(cpu_group_start == -1)) { in init_thread_group_cache_map()
971 WARN_ON_ONCE(1); in init_thread_group_cache_map()
972 return -ENODATA; in init_thread_group_cache_map()
976 mask = &per_cpu(thread_group_l1_cache_map, cpu); in init_thread_group_cache_map()
977 update_mask_from_threadgroup(mask, tg, cpu, cpu_group_start); in init_thread_group_cache_map()
980 mask = &per_cpu(thread_group_l2_cache_map, cpu); in init_thread_group_cache_map()
981 update_mask_from_threadgroup(mask, tg, cpu, cpu_group_start); in init_thread_group_cache_map()
982 mask = &per_cpu(thread_group_l3_cache_map, cpu); in init_thread_group_cache_map()
983 update_mask_from_threadgroup(mask, tg, cpu, cpu_group_start); in init_thread_group_cache_map()
1019 * returns a non-const pointer and the compiler barfs on that.
1021 static const struct cpumask *shared_cache_mask(int cpu) in shared_cache_mask() argument
1023 return per_cpu(cpu_l2_cache_map, cpu); in shared_cache_mask()
1027 static const struct cpumask *smallcore_smt_mask(int cpu) in smallcore_smt_mask() argument
1029 return cpu_smallcore_mask(cpu); in smallcore_smt_mask()
1033 static struct cpumask *cpu_coregroup_mask(int cpu) in cpu_coregroup_mask() argument
1035 return per_cpu(cpu_coregroup_map, cpu); in cpu_coregroup_mask()
1043 static const struct cpumask *cpu_mc_mask(int cpu) in cpu_mc_mask() argument
1045 return cpu_coregroup_mask(cpu); in cpu_mc_mask()
1060 int cpu; in init_big_cores() local
1062 for_each_possible_cpu(cpu) { in init_big_cores()
1063 int err = init_thread_group_cache_map(cpu, THREAD_GROUP_SHARE_L1); in init_big_cores()
1068 zalloc_cpumask_var_node(&per_cpu(cpu_smallcore_map, cpu), in init_big_cores()
1070 cpu_to_node(cpu)); in init_big_cores()
1075 for_each_possible_cpu(cpu) { in init_big_cores()
1076 int err = init_thread_group_cache_map(cpu, THREAD_GROUP_SHARE_L2_L3); in init_big_cores()
1091 unsigned int cpu, num_threads; in smp_prepare_cpus() local
1096 * setup_cpu may need to be called on the boot cpu. We haven't in smp_prepare_cpus()
1101 /* Fixup boot cpu */ in smp_prepare_cpus()
1103 cpu_callin_map[boot_cpuid] = 1; in smp_prepare_cpus()
1105 for_each_possible_cpu(cpu) { in smp_prepare_cpus()
1106 zalloc_cpumask_var_node(&per_cpu(cpu_sibling_map, cpu), in smp_prepare_cpus()
1107 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1108 zalloc_cpumask_var_node(&per_cpu(cpu_l2_cache_map, cpu), in smp_prepare_cpus()
1109 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1110 zalloc_cpumask_var_node(&per_cpu(cpu_core_map, cpu), in smp_prepare_cpus()
1111 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1113 zalloc_cpumask_var_node(&per_cpu(cpu_coregroup_map, cpu), in smp_prepare_cpus()
1114 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1120 if (cpu_present(cpu)) { in smp_prepare_cpus()
1121 set_cpu_numa_node(cpu, numa_cpu_lookup_table[cpu]); in smp_prepare_cpus()
1122 set_cpu_numa_mem(cpu, in smp_prepare_cpus()
1123 local_memory_node(numa_cpu_lookup_table[cpu])); in smp_prepare_cpus()
1128 /* Init the cpumasks so the boot CPU is related to itself */ in smp_prepare_cpus()
1142 if (cpu_to_chip_id(boot_cpuid) != -1) { in smp_prepare_cpus()
1148 * Assumption: if boot_cpuid doesn't have a chip-id, then no in smp_prepare_cpus()
1149 * other CPUs, will also not have chip-id. in smp_prepare_cpus()
1153 memset(chip_id_lookup_table, -1, sizeof(int) * idx); in smp_prepare_cpus()
1156 if (smp_ops && smp_ops->probe) in smp_prepare_cpus()
1157 smp_ops->probe(); in smp_prepare_cpus()
1160 num_threads = 1; in smp_prepare_cpus()
1170 paca_ptrs[boot_cpuid]->__current = current; in smp_prepare_boot_cpu()
1180 unsigned int cpu = smp_processor_id(); in generic_cpu_disable() local
1182 if (cpu == boot_cpuid) in generic_cpu_disable()
1183 return -EBUSY; in generic_cpu_disable()
1185 set_cpu_online(cpu, false); in generic_cpu_disable()
1187 vdso_data->processorCount--; in generic_cpu_disable()
1189 /* Update affinity of all IRQs previously aimed at this CPU */ in generic_cpu_disable()
1194 * that one of the interrupts we just migrated away from this CPU is in generic_cpu_disable()
1195 * actually already pending on this CPU. If we leave it in that state in generic_cpu_disable()
1198 * be received (and EOI'ed), before we take this CPU offline. in generic_cpu_disable()
1201 mdelay(1); in generic_cpu_disable()
1207 void generic_cpu_die(unsigned int cpu) in generic_cpu_die() argument
1213 if (is_cpu_dead(cpu)) in generic_cpu_die()
1217 printk(KERN_ERR "CPU%d didn't die...\n", cpu); in generic_cpu_die()
1220 void generic_set_cpu_dead(unsigned int cpu) in generic_set_cpu_dead() argument
1222 per_cpu(cpu_state, cpu) = CPU_DEAD; in generic_set_cpu_dead()
1230 void generic_set_cpu_up(unsigned int cpu) in generic_set_cpu_up() argument
1232 per_cpu(cpu_state, cpu) = CPU_UP_PREPARE; in generic_set_cpu_up()
1235 int generic_check_cpu_restart(unsigned int cpu) in generic_check_cpu_restart() argument
1237 return per_cpu(cpu_state, cpu) == CPU_UP_PREPARE; in generic_check_cpu_restart()
1240 int is_cpu_dead(unsigned int cpu) in is_cpu_dead() argument
1242 return per_cpu(cpu_state, cpu) == CPU_DEAD; in is_cpu_dead()
1256 static void cpu_idle_thread_init(unsigned int cpu, struct task_struct *idle) in cpu_idle_thread_init() argument
1259 paca_ptrs[cpu]->__current = idle; in cpu_idle_thread_init()
1260 paca_ptrs[cpu]->kstack = (unsigned long)task_stack_page(idle) + in cpu_idle_thread_init()
1261 THREAD_SIZE - STACK_FRAME_MIN_SIZE; in cpu_idle_thread_init()
1263 task_thread_info(idle)->cpu = cpu; in cpu_idle_thread_init()
1264 secondary_current = current_set[cpu] = idle; in cpu_idle_thread_init()
1267 int __cpu_up(unsigned int cpu, struct task_struct *tidle) in __cpu_up() argument
1271 const unsigned long hp_spin_ms = 1; in __cpu_up()
1279 if (threads_per_core > 1 && secondaries_inhibited() && in __cpu_up()
1280 cpu_thread_in_subcore(cpu)) in __cpu_up()
1281 return -EBUSY; in __cpu_up()
1284 (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))) in __cpu_up()
1285 return -EINVAL; in __cpu_up()
1287 cpu_idle_thread_init(cpu, tidle); in __cpu_up()
1291 * up the CPU in __cpu_up()
1293 if (smp_ops->prepare_cpu) { in __cpu_up()
1294 rc = smp_ops->prepare_cpu(cpu); in __cpu_up()
1299 /* Make sure callin-map entry is 0 (can be leftover a CPU in __cpu_up()
1302 cpu_callin_map[cpu] = 0; in __cpu_up()
1311 DBG("smp: kicking cpu %d\n", cpu); in __cpu_up()
1312 rc = smp_ops->kick_cpu(cpu); in __cpu_up()
1314 pr_err("smp: failed starting cpu %d (rc %d)\n", cpu, rc); in __cpu_up()
1326 spin_until_cond(cpu_callin_map[cpu] || time_is_before_jiffies(deadline)); in __cpu_up()
1328 if (!cpu_callin_map[cpu] && system_state >= SYSTEM_RUNNING) { in __cpu_up()
1333 while (!cpu_callin_map[cpu] && time_is_after_jiffies(deadline)) in __cpu_up()
1337 if (!cpu_callin_map[cpu]) { in __cpu_up()
1338 printk(KERN_ERR "Processor %u is stuck.\n", cpu); in __cpu_up()
1339 return -ENOENT; in __cpu_up()
1342 DBG("Processor %u found.\n", cpu); in __cpu_up()
1344 if (smp_ops->give_timebase) in __cpu_up()
1345 smp_ops->give_timebase(); in __cpu_up()
1347 /* Wait until cpu puts itself in the online & active maps */ in __cpu_up()
1348 spin_until_cond(cpu_online(cpu)); in __cpu_up()
1354 * logical cpu.
1356 int cpu_to_core_id(int cpu) in cpu_to_core_id() argument
1359 int id = -1; in cpu_to_core_id()
1361 np = of_get_cpu_node(cpu, NULL); in cpu_to_core_id()
1372 /* Helper routines for cpu to core mapping */
1373 int cpu_core_index_of_thread(int cpu) in cpu_core_index_of_thread() argument
1375 return cpu >> threads_shift; in cpu_core_index_of_thread()
1386 * i.e. during cpu online or offline.
1388 static struct device_node *cpu_to_l2cache(int cpu) in cpu_to_l2cache() argument
1393 if (!cpu_present(cpu)) in cpu_to_l2cache()
1396 np = of_get_cpu_node(cpu, NULL); in cpu_to_l2cache()
1407 static bool update_mask_by_l2(int cpu, cpumask_var_t *mask) in update_mask_by_l2() argument
1417 * If the threads in a thread-group share L2 cache, then the in update_mask_by_l2()
1418 * L2-mask can be obtained from thread_group_l2_cache_map. in update_mask_by_l2()
1421 cpumask_set_cpu(cpu, cpu_l2_cache_mask(cpu)); in update_mask_by_l2()
1423 for_each_cpu(i, per_cpu(thread_group_l2_cache_map, cpu)) { in update_mask_by_l2()
1425 set_cpus_related(i, cpu, cpu_l2_cache_mask); in update_mask_by_l2()
1428 /* Verify that L1-cache siblings are a subset of L2 cache-siblings */ in update_mask_by_l2()
1429 if (!cpumask_equal(submask_fn(cpu), cpu_l2_cache_mask(cpu)) && in update_mask_by_l2()
1430 !cpumask_subset(submask_fn(cpu), cpu_l2_cache_mask(cpu))) { in update_mask_by_l2()
1431 pr_warn_once("CPU %d : Inconsistent L1 and L2 cache siblings\n", in update_mask_by_l2()
1432 cpu); in update_mask_by_l2()
1438 l2_cache = cpu_to_l2cache(cpu); in update_mask_by_l2()
1440 /* Assume only core siblings share cache with this CPU */ in update_mask_by_l2()
1441 for_each_cpu(i, cpu_sibling_mask(cpu)) in update_mask_by_l2()
1442 set_cpus_related(cpu, i, cpu_l2_cache_mask); in update_mask_by_l2()
1447 cpumask_and(*mask, cpu_online_mask, cpu_cpu_mask(cpu)); in update_mask_by_l2()
1449 /* Update l2-cache mask with all the CPUs that are part of submask */ in update_mask_by_l2()
1450 or_cpumasks_related(cpu, cpu, submask_fn, cpu_l2_cache_mask); in update_mask_by_l2()
1452 /* Skip all CPUs already part of current CPU l2-cache mask */ in update_mask_by_l2()
1453 cpumask_andnot(*mask, *mask, cpu_l2_cache_mask(cpu)); in update_mask_by_l2()
1457 * when updating the marks the current CPU has not been marked in update_mask_by_l2()
1462 /* Skip all CPUs already part of current CPU l2-cache */ in update_mask_by_l2()
1464 or_cpumasks_related(cpu, i, submask_fn, cpu_l2_cache_mask); in update_mask_by_l2()
1478 static void remove_cpu_from_masks(int cpu) in remove_cpu_from_masks() argument
1483 unmap_cpu_from_node(cpu); in remove_cpu_from_masks()
1488 for_each_cpu(i, mask_fn(cpu)) { in remove_cpu_from_masks()
1489 set_cpus_unrelated(cpu, i, cpu_l2_cache_mask); in remove_cpu_from_masks()
1490 set_cpus_unrelated(cpu, i, cpu_sibling_mask); in remove_cpu_from_masks()
1492 set_cpus_unrelated(cpu, i, cpu_smallcore_mask); in remove_cpu_from_masks()
1495 for_each_cpu(i, cpu_core_mask(cpu)) in remove_cpu_from_masks()
1496 set_cpus_unrelated(cpu, i, cpu_core_mask); in remove_cpu_from_masks()
1499 for_each_cpu(i, cpu_coregroup_mask(cpu)) in remove_cpu_from_masks()
1500 set_cpus_unrelated(cpu, i, cpu_coregroup_mask); in remove_cpu_from_masks()
1505 static inline void add_cpu_to_smallcore_masks(int cpu) in add_cpu_to_smallcore_masks() argument
1512 cpumask_set_cpu(cpu, cpu_smallcore_mask(cpu)); in add_cpu_to_smallcore_masks()
1514 for_each_cpu(i, per_cpu(thread_group_l1_cache_map, cpu)) { in add_cpu_to_smallcore_masks()
1516 set_cpus_related(i, cpu, cpu_smallcore_mask); in add_cpu_to_smallcore_masks()
1520 static void update_coregroup_mask(int cpu, cpumask_var_t *mask) in update_coregroup_mask() argument
1523 int coregroup_id = cpu_to_coregroup_id(cpu); in update_coregroup_mask()
1530 /* Assume only siblings are part of this CPU's coregroup */ in update_coregroup_mask()
1531 for_each_cpu(i, submask_fn(cpu)) in update_coregroup_mask()
1532 set_cpus_related(cpu, i, cpu_coregroup_mask); in update_coregroup_mask()
1537 cpumask_and(*mask, cpu_online_mask, cpu_cpu_mask(cpu)); in update_coregroup_mask()
1540 or_cpumasks_related(cpu, cpu, submask_fn, cpu_coregroup_mask); in update_coregroup_mask()
1543 cpumask_andnot(*mask, *mask, cpu_coregroup_mask(cpu)); in update_coregroup_mask()
1548 or_cpumasks_related(cpu, i, submask_fn, cpu_coregroup_mask); in update_coregroup_mask()
1556 static void add_cpu_to_masks(int cpu) in add_cpu_to_masks() argument
1559 int first_thread = cpu_first_thread_sibling(cpu); in add_cpu_to_masks()
1561 int chip_id = -1; in add_cpu_to_masks()
1566 * This CPU will not be in the online mask yet so we need to manually in add_cpu_to_masks()
1569 map_cpu_to_node(cpu, cpu_to_node(cpu)); in add_cpu_to_masks()
1570 cpumask_set_cpu(cpu, cpu_sibling_mask(cpu)); in add_cpu_to_masks()
1571 cpumask_set_cpu(cpu, cpu_core_mask(cpu)); in add_cpu_to_masks()
1575 set_cpus_related(i, cpu, cpu_sibling_mask); in add_cpu_to_masks()
1577 add_cpu_to_smallcore_masks(cpu); in add_cpu_to_masks()
1579 /* In CPU-hotplug path, hence use GFP_ATOMIC */ in add_cpu_to_masks()
1580 ret = alloc_cpumask_var_node(&mask, GFP_ATOMIC, cpu_to_node(cpu)); in add_cpu_to_masks()
1581 update_mask_by_l2(cpu, &mask); in add_cpu_to_masks()
1584 update_coregroup_mask(cpu, &mask); in add_cpu_to_masks()
1587 chip_id = cpu_to_chip_id(cpu); in add_cpu_to_masks()
1593 or_cpumasks_related(cpu, cpu, submask_fn, cpu_core_mask); in add_cpu_to_masks()
1595 /* Skip all CPUs already part of current CPU core mask */ in add_cpu_to_masks()
1596 cpumask_andnot(mask, cpu_online_mask, cpu_core_mask(cpu)); in add_cpu_to_masks()
1598 /* If chip_id is -1; limit the cpu_core_mask to within DIE*/ in add_cpu_to_masks()
1599 if (chip_id == -1) in add_cpu_to_masks()
1600 cpumask_and(mask, mask, cpu_cpu_mask(cpu)); in add_cpu_to_masks()
1604 or_cpumasks_related(cpu, i, submask_fn, cpu_core_mask); in add_cpu_to_masks()
1618 unsigned int cpu = raw_smp_processor_id(); in start_secondary() local
1625 current->active_mm = &init_mm; in start_secondary()
1627 cpumask_set_cpu(cpu, mm_cpumask(&init_mm)); in start_secondary()
1630 smp_store_cpu_info(cpu); in start_secondary()
1632 rcu_cpu_starting(cpu); in start_secondary()
1633 cpu_callin_map[cpu] = 1; in start_secondary()
1635 if (smp_ops->setup_cpu) in start_secondary()
1636 smp_ops->setup_cpu(cpu); in start_secondary()
1637 if (smp_ops->take_timebase) in start_secondary()
1638 smp_ops->take_timebase(); in start_secondary()
1644 vdso_data->processorCount++; in start_secondary()
1648 set_numa_node(numa_cpu_lookup_table[cpu]); in start_secondary()
1649 set_numa_mem(local_memory_node(numa_cpu_lookup_table[cpu])); in start_secondary()
1651 /* Update topology CPU masks */ in start_secondary()
1652 add_cpu_to_masks(cpu); in start_secondary()
1656 * per-core basis because one core in the pair might be disabled. in start_secondary()
1660 struct cpumask *mask = cpu_l2_cache_mask(cpu); in start_secondary()
1665 if (cpumask_weight(mask) > cpumask_weight(sibling_mask(cpu))) in start_secondary()
1670 notify_cpu_starting(cpu); in start_secondary()
1671 set_cpu_online(cpu, true); in start_secondary()
1702 * - Dont consolidate if masks are different. in fixup_topology()
1703 * - Dont consolidate if sd_flags exists and are different. in fixup_topology()
1705 for (i = 1; i <= die_idx; i++) { in fixup_topology()
1706 if (powerpc_topology[i].mask != powerpc_topology[i - 1].mask) in fixup_topology()
1709 if (powerpc_topology[i].sd_flags && powerpc_topology[i - 1].sd_flags && in fixup_topology()
1710 powerpc_topology[i].sd_flags != powerpc_topology[i - 1].sd_flags) in fixup_topology()
1713 if (!powerpc_topology[i - 1].sd_flags) in fixup_topology()
1714 powerpc_topology[i - 1].sd_flags = powerpc_topology[i].sd_flags; in fixup_topology()
1716 powerpc_topology[i].mask = powerpc_topology[i + 1].mask; in fixup_topology()
1717 powerpc_topology[i].sd_flags = powerpc_topology[i + 1].sd_flags; in fixup_topology()
1719 powerpc_topology[i].name = powerpc_topology[i + 1].name; in fixup_topology()
1727 * We are running pinned to the boot CPU, see rest_init(). in smp_cpus_done()
1729 if (smp_ops && smp_ops->setup_cpu) in smp_cpus_done()
1730 smp_ops->setup_cpu(boot_cpuid); in smp_cpus_done()
1732 if (smp_ops && smp_ops->bringup_done) in smp_cpus_done()
1733 smp_ops->bringup_done(); in smp_cpus_done()
1744 int cpu = smp_processor_id(); in __cpu_disable() local
1747 if (!smp_ops->cpu_disable) in __cpu_disable()
1748 return -ENOSYS; in __cpu_disable()
1752 err = smp_ops->cpu_disable(); in __cpu_disable()
1757 remove_cpu_from_masks(cpu); in __cpu_disable()
1762 void __cpu_die(unsigned int cpu) in __cpu_die() argument
1768 VM_WARN_ON_ONCE(!cpumask_test_cpu(cpu, mm_cpumask(&init_mm))); in __cpu_die()
1770 cpumask_clear_cpu(cpu, mm_cpumask(&init_mm)); in __cpu_die()
1772 if (smp_ops->cpu_die) in __cpu_die()
1773 smp_ops->cpu_die(cpu); in __cpu_die()
1779 * Disable on the down path. This will be re-enabled by in arch_cpu_idle_dead()
1784 if (smp_ops->cpu_offline_self) in arch_cpu_idle_dead()
1785 smp_ops->cpu_offline_self(); in arch_cpu_idle_dead()
1787 /* If we return, we re-enter start_secondary */ in arch_cpu_idle_dead()